42891915431 has 8 divisors (see below), whose sum is σ = 43145342064. Its totient is φ = 42638552320.

The previous prime is 42891915421. The next prime is 42891915457. The reversal of 42891915431 is 13451919824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42891915431 - 2¹⁰ = 42891914407 is a prime.

It is a super-2 number, since 2×42891915431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42891915421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2510540 + ... + 2527566.

It is an arithmetic number, because the mean of its divisors is an integer number (5393167758).

Almost surely, 2^42891915431 is an apocalyptic number.

42891915431 is a deficient number, since it is larger than the sum of its proper divisors (253426633).

42891915431 is a wasteful number, since it uses less digits than its factorization.

42891915431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31761.

The product of its digits is 311040, while the sum is 47.

The spelling of 42891915431 in words is "forty-two billion, eight hundred ninety-one million, nine hundred fifteen thousand, four hundred thirty-one".